Iron Man

Suits:
Mark 1 suit:
Complete Mission 1 to unlock Mark 1 suit.

Mark 2 suit:
Complete Mission 2 to unlock Mark 2 suit.

Mark 3 suit:
Complete Mission 4 to unlock Mark 3 suit.

Classic suit:
Complete Mission 6 to unlock Classic suit.

Classic Red and Gold suit:
Complete Mission 9 to unlock Classic Red and Gold suit.

Stealth suit:
Complete Mission 11 to unlock Stealth suit.

Titanium Man suit:
Complete Last mission to unlock Titanium Man suit.

Unlock all suits:
Complete the game on the Easy difficulty level to unlock all suits.

Initial D: Street Stage

Xside:
Lose several times on Bunta level 10 at Irohazaka. Choose the left card.
The engine upgrade should be appear.

Infected

Easy combos:
Get the chainsaw, and the combos will become easier. Stand over a Manhole, let
the chainsaw rip, and watch your combos, go over the top. Ones with lots of
enemies around them are the best.
You can get easily up to 10 combo with one slice.

Unlock Santa Claus and Bloodrayne:
Finish - all missions.

Getting avatars:
Kill the zombies near the slipknot sign in the following missions:

Slipknot 0 - Sign location at Time Square in mission 5.
Slipknot 1 - Sign location in the subway in mission 7.
Slipknot 2 - Sign location by the helicopter - in mission 10.
Slipknot 3 - Sign location in the upper left section of the map in mission 13,
Slipknot 4 - Sign location near the landing zone In mission 16.
Slipknot 5 - Sign location in Time Square in mission 20.
Slipknot 6 - Sign location in the bottom section of the map in mission 23.
Slipknot 7 - Sign can be found when the missionstart screen in mission 26.
Slipknot 8 - Sign location in the bottom right section of the map in mission 31
Chimaira - Sign location in the long street section under the park in mission 29

Getting the 1 avatar:
Type the cheatcode when examining the 1 Avatar:
Use the R to spin. Spin twice on the 2nd spin stop, after press:
Triangle X,X then Triangle Circle

Ikkitousen: Eloquent Fist

Unlockables

Saji Genpou:
Finish Arcade mode to unlock Saji Genpou.

Ryu Hakufu:
Finish Arcade mode as Hakufu to unlock Ryu Hakufu.

Ryu Gentoku:
Finish Arcade mode as Gentoku to unlock Ryu Gentoku.

Sousou Moutoku
Finish Story mode with all three schools to unlock Sousou Moutoku.


Get bonus continues:
Finish Story Mode 3 times to get a total of 9 maximum continues.

Unlock 2nd special move:
Reach level 10 with a character to unlock special move for that character.
To use their second special move, press L + Triangle.

Gallery pages:
Finish Arcade mode to unlock the gallery page for that
specific character.

Alternative victory scene:
Defeat a boss with any of the special move.
(L + Square or L + Triangle)


Bonus costumes:
Finish Arcade mode with a character to unlock 3 new costumes for
that character. Go to the character selection screen in Arcade mode
and press L or R to select any of it.